IRID is engaged in the ongoing development of technology for repairing leakage points in the Primary Containment Vessel (PCV) under a project sponsored by the Ministry of Economy, Trade and Industry (METI) between FY2016 and 2017 for the decommissioning of the Fukushima Daiichi Nuclear Power Station (NPS). As part of this project, IRID conducted testing of technology for the reinforcement of suppression chamber (S/C) by injecting mortar.

● Testing Overview [Technology for reinforcement of S/C support columns] R&D is being conducted for water stoppage technology by injecting filling inside the S/C, in order to retrieve fuel debris. The total weight of the S/C is expected to increase due to this injected filling; therefore, IRID is committed to R&D for seismic strengthening of S/C support columns by injecting reinforcement materials in the lower part of the S/C.

A workability verification test and concrete injecting test will be conducted for each technology. A series of full-scale tests for the development of construction methods is slated for completion by the end of FY2017.

*We expect to provide updates on the tests once the test schedule is confirmed.